diff --git a/swash/processing/animate.py b/swash/processing/animate.py
index b6cd8ff..33796ce 100644
--- a/swash/processing/animate.py
+++ b/swash/processing/animate.py
@@ -41,7 +41,14 @@ wl = np.maximum(watl, -botl)
 fig, ax = plt.subplots()
 ax.plot(x, -botl, c="k")
 ax.set(xlim=(x.min(), x.max()), ylim=(-30, 10), xlabel="x (m)", ylabel="z (m)")
-tit = ax.text(0.5, 0, f't={t[0]}', horizontalalignment='center', verticalalignment='bottom', transform=ax.transAxes)
+tit = ax.text(
+    0.5,
+    0,
+    f"t={t[0]}",
+    horizontalalignment="center",
+    verticalalignment="bottom",
+    transform=ax.transAxes,
+)
 ax.grid()
 # ax.fill_between(
 #    x, -botl, -data["botl"] + bathy.hstru, color="k", alpha=0.2